About this 3D model

Four of these are used to pre-register the alignment of the NextEngine 3D Laser Scanner HD when doing long linear scans. Designed to hold LED laser cross hair modules aligned in such a way as to produce a laser square outlining the scanning envelope. They are attached to an 80/20 strut frame work, see - http://www.zip-bit.com/Products/NextEngine/NextEngine-Laser_Alignment_Guides/NextEngine-Scan_Envelope_Guides.html